Adding coordinate values (x,y) to a matrix depending on another matrix

There is one matrix that is a 10 x 10 that is initially all zeros.

matrix = zeros(10,10)

This matrix will eventually replace values of 0 with 1 until the whole matrix is made up of 1's.

There is another matrix that is an unknown number (L) x 2

track = zeros(L,2)

Now what I would like to do is populate track with coordinates whenever matrix changes from 0 to 1. So if a 1 is found in matrix in the 2nd row 1st column then the next value of 1 is in the 5th row 10th column, track will look like

track = [2 1; 5 10]

What is a possible way to do this?

Answer 1

[Walter Roberson]

[tr, tc] = find(matrix);
track = [tr, tc];